Unbelievable Facts About The Human Eye
Your retinas actually perceive the outside world as upside-down – your brain flips the image for you.
In addition to being upside-down, images arrive at your retina split in half and distorted.
Your retinas cannot detect the colour red.
All humans originally had brown eyes. Blue eyes appeared as a mutation about 6,000 years ago.
On average, you blink 17 times a minute. That’s 14,280 times in a 14-hour day, and 5.2 million times a year.
If you’re shortsighted, your eyeball is longer than normal. If you’re farsighted, it’s shorter than average.
Your eyes are almost the same size as they were when you were born.
Newborn babies can see clearly up to 15 inches away.
Your tears have different compositions based on whether something’s irritating your eye, or you’re crying, or yawning.
Your eye is constantly making tiny jerking movements called “microsaccades” to stop objects from fading from your vision.